This would be within an If/End If pair of lines?
You can jump out to another script using the PerformScript step. Nothing I know of to skip to a specified line in FM.
There are a few ways.
The simplest is to use an If statement.
If [ condition if you DON'T want to skip to the line ]
#skips to this point if condition was true
Another way is to use a single pass loop:
Exit Loop If [condition if you want to go to the line after the loop]
Exit Loop if 
#A true "single pass" loop always exits at the end, but it could also exit much earlier
#skips to this point when any exit loop condition was true
there is no 'GoTo [Line#]' nor 'GoTo [Label]' script-step - and I'm not unhappy with that (-:
As mentioned in the other postings, use 'perform script' as subscript or branch or use if/else-if/end-if
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