i was told i can't use gce for admissions

Yes....it is true.

To enter an American university you need to pass these two exams (undergraduates)

1.Test of English as a Foreign Language

2.The SAT.

Once you pass both of them.....you are good to go.

Further info here http://nigeria.usembassy.gov/eac_faq.html

if i have nov/dec wassce and a nice SAT score nko?

Kikero112:
Yes....it is true.

To enter an American university you need to pass these two exams (undergraduates)

1.Test of English as a Foreign Language

2.The SAT.

Once you pass both of them.....you are good to go.

Further info here http://nigeria.usembassy.gov/eac_faq.html

smart3856:
if i have nov/dec wassce and a nice SAT score nko?

Sorry am late.

Sit for the exams

Identify the exams you need to sit for and start preparation. If you have your West African Senior School Certificate Exam (WASSCE) results and wish to pursue an undergraduate degree in the United States or Canada, then, you need to sit for the SAT and TOEFL. But, if you already have your degree from the university and wishes to go for a Masters degree in the US, then, you need to sit for the GRE or GMAT and then, the TOEFL. If you want to study for a Masters degree in Business Administration (MBA) or a Masters degree in Management, then you need to sit for the GMAT and TOEFL. But, if you want a postgraduate degree in Engineering, science or MSc, then, you will sit for the GRE and TOEFL. An alternative for TOEFL is the IELTS, but it is not all schools that accept it. If you choose to sit for the IELTS, you must find out if your schools accept it before opting for it, otherwise TOEFL remains your best choice.

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Apply to Schools

Now, that you have chosen your schools, it is time to apply to all of them one by one.
Applications can be done on-line (in most schools) or through post for all schools. Every school charges an application fee which ranges from $20.00 to $150.00. Every school has their own admission requirements but they generally have similar requirements. Some basic admission requirements are:

TOEFL Score
SAT or GRE/GMAT Score
High School Transcripts or University Transcripts
WAEC result
Bank Statement within the last 6 months
Recommendation Letter
Other certificates received
Each school has its own deadline for application, so, be sure to apply on time. The exam scores will not be sent by you but by the exam body directly to the school. That is why you will fill-in the school you want to receive your scores on the exam day (for GRE/GMAT) or in the registration form (for SAT). When sending your WASSCE result, include a scratch card which they will use to confirm your result from WAEC’s website.

Pay the Sevis Fee and the Visa Fee

When you have received your admission letter and I-20 form from the school, the next step is to pay the sevis fee and commence preparation for visa interview. The Student and Exchange Visitor Information System (SEVIS) is the web-accessible database for monitoring information about exchange visitors, international students and scholars subject to this program. It was established by the Department of Homeland Security in the United States, and is administered by the Student and Exchange Visitor Program (SEVP). The sevis fee is required of all foreign nationals who come into the United States for the purpose of pursuing a full course of study. After paying the sevis fee, then pay the visa fees. In Nigeria, it is paid to any Guaranty Trust Bank (GTB) branch and it costs around NGN 31,000.00

Fill the DS-160 Form and Book for a Visa Interview

When you have paid both the sevis and visa fees, fill the DS-160 form on-line. You will need to create a user id (your e-mail) and password. Complete all pages of the form and print the confirmation page. You will need to take the confirmation page printout to the US embassy.
After filling the DS-160 form, book a visa interview date on-line and also print out the confirmation. You will have the option of selecting either the US embassy in Lagos or in Abuja as well as selecting the passport pick-up point if you successfully obtain a visa.

Source:http://www.meteducationng.com/a-nigerian-students-guide-to-studying-abroad/