Request Line is too large (8192 > 4094)

I am using nginx and gunicorn to deploy my django project, when I use GET funcation posted data to server I get the error:

Bad Request

Request Line is too large (8192 > 4094)

On nginx.conf I have:

client_max_body_size 100g;
client_header_buffer_size 512k;
large_client_header_buffers 4 512k;

Many methods on the Internet are changing "large_client_header_buffers" from 4 512k; but didn't fix the problem.

Any help or explanation is welcome! Thank you.