GPC GMP units

Dear GPC-ers, my gpc, version 2.1 (20020510), based on gcc-2.95.3 20010315 (release) does not find the units GPC and GMP, upon compilation of the demo program fibonacci.pas I get fibonacci.pas:31: module/unit interface `Gpc' could not be imported The same with GMP. What is wrong? Thanks, K. Veselic.