Table schema:
CREATE TABLE table_name_61 (grid INTEGER, driver VARCHAR, laps VARCHAR, time_retired VARCHAR)

Question: What is the average grid that has over 8 laps, a Time/Retired of +2 laps, and peter gethin driving?
SQL: SELECT AVG(grid) FROM table_name_61 WHERE laps > 8 AND time_retired = "+2 laps" AND driver = "peter gethin"