[Koha] Enquire about Paid Support Vendor for KOHA

Dear Sir, We are interested to be a paid support provider for Koha. In this regards we want to know that: a. Is this possible to charge price for enhanced customization and support rendering for Koha. (we found that it is under GPL; is there any issue for charging for customization, installation and provide support through the year). b. If it is possible, then please give us a guideline to how to become a paid support provider (vendor) for koha. Looking for your kind response. Regards Via Vitae Solutions