My initial "guess" would be a capacity of 2-Tons base on the "24" imbedded in your unit's Model Number BTB924A100A1.
There are 12,000BTU's in One Ton of cooling capacity. Note that BTU's (British Thermal Units) are a per hour value, and Ton's are a per day value. The Ton value comes from an era when cooling was acomplished with ice, thus One Ton of Ice melting over a delta time increment of 24-hours absorbs (12,000 x 24) 288,000BTU's.
To be absolutely certain you need to touch base with someone who has a copy of Trane's Eagle CD's which contain the aggregate data for all GE's models.