Sorry, my regexp-fu is not so great, here are a few more:
[brad:~/programs/gambc-4.0b22/gsc] lucier% grep 'NEED_GLO.*___G_c [^_]' *.c | sort | uniq -c 1 _front.c:___NEED_GLO(___G_close_2d_output_2d_port) 1 _front.c:___NEED_GLO(___G_current_2d_output_2d_port) 1 _gsc.c:___NEED_GLO(___G_compile_2d_file) 1 _gsc.c:___NEED_GLO(___G_compile_2d_file_2d_to_2d_c) 1 _gvm.c:___NEED_GLO(___G_cons) 1 _source.c:___NEED_GLO(___G_close_2d_input_2d_port) 1 _t-c-1.c:___NEED_GLO(___G_close_2d_input_2d_port) 1 _t-c-1.c:___NEED_GLO(___G_close_2d_output_2d_port) 1 _t-c-2.c:___NEED_GLO(___G_car) 1 _t-c-2.c:___NEED_GLO(___G_cdr) 1 _t-c-2.c:___NEED_GLO(___G_ceiling) 1 _t-c-2.c:___NEED_GLO(___G_char_2d__3e_integer) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_alphabetic_3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_ci_3c__3d__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_ci_3c__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_ci_3d__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_ci_3e__3d__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_ci_3e__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_downcase) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_lower_2d_case_3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_numeric_3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_upcase) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_upper_2d_case_3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_2d_whitespace_3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_3c__3d__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_3c__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_3d__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_3e__3d__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_3e__3f_) 1 _t-c-2.c:___NEED_GLO(___G_char_3f_) 1 _t-c-2.c:___NEED_GLO(___G_complex_3f_) 1 _t-c-2.c:___NEED_GLO(___G_cos)