Using sed commands in your .alias file in C shell is always tricky. One example of the same is:
alias grf 'set fileNline = `echo "\!*" | sed -e "s/\([^ ]*\):\([0-9]*\):.*/+\2 \1/"`;gvim $fileNline'
This alias is called as:
and then it open the file "file" in gvim with cursor at line "line_num".