Hello Nikolay.  Sorry for the late reply. Indeed to get GPs is a real struggle. Do not seek it to emporium as you just will killing your units in vain.   Get the Gps you need from the   events and tournaments that have them as a reward.  Such as the Coalition conflict tournament and Elysian Missions, plus other tournaments. 

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The Moderators for Sparta: War of Empires are the unsung heroes of the game! Their dedication to maintaining a fair, engaging, and enjoyable environment is truly commendable. By fostering a positive community, addressing concerns, and ensuring smooth gameplay, they enhance the experience for all players. Their efforts reflect a deep commitment to the success of the game and its vibrant player base. A heartfelt thank you for their invaluable contribution. 

Thanks archon