In reply to Ecatrina.

You can ask questions and post your code at the SAS Support Communities. Briefly, if you have two groups you can use the use PROC TTEST with DIST=LOGNORMAL as mentioned in the topic "Geometric Means" in the FASTats list. You can use LSMEANS / EXP to get the geometric mean estimates. If you want ratios, look at NLEstimate macro.