Download webgate installer from
http://download.oracle.com/otn/linux/ias/101401/oam_int_linux_v8_cd1.zip
Login with putty on the server:
su - root
mkdir -p $WEBGATE_HOME/gcc
cp /lib64/libgcc_s.so.1 /appl/oracle/access_10.1.4/gcc/
cp /usr/lib64/libstdc++.so.5 /appl/oracle/access_10.1.4/gcc/
unzip oam_int_linux_v8_cd1.zip
./Oracle_Access_Manager10_1_4_2_3_linux64_APACHE22_WebGate