
Formulate an answer to this elaborate question: Guinness Peat Aviation (GPA) was a Commercial Aircraft Sales and Leasing company set up in 1975 by Aer Lingus, the Guinness Peat Group, and Tony Ryan, he was a founder of Guinness Peat Aviation (GPA) as well as co-founder of Ryanair, with Christy Ryan and who?


Liam Lonergan
