EXHIBIT 5


                               ROBERT BRANTL, ESQ.
                                52 Mulligan Lane
                               Irvington, NY 10533
                                  914-693-3026

April 23, 2007

GS CleanTech Corporation
One Penn Plaza, Suite 1612
New York, NY 10119

Ladies and Gentlemen:

With  reference  to the  Registration  Statement  on Form S-8 which GS CleanTech
Corporation  proposes  to file  with  the  Securities  and  Exchange  Commission
registering  25,000,000  common  shares  which  may be  offered  and  sold by GS
CleanTech   Corporation  under  the  2007  Equity  Incentive  Option  Plan  (the
"Shares"),  I am of the opinion that all proper corporate  proceedings have been
taken so that the Shares,  upon sale and payment therefor in accordance with the
Plan, will be legally issued, fully paid, and nonassessable.

I hereby  consent to the filing of this opinion with the Securities and Exchange
Commission in connection with the Registration Statement referred to above.

               Yours,

               /s/ Robert Brantl
               -------------------------
                   Robert Brantl

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