These are what betterbidding shows for Main Gate Champions Gate - so 3* is probably (but not 100% sure) either Parkway International, Raddison Worldgate (my guess, just because your listing mentions "business") or Ramada Plaza:
Orlando (Disney Main Gate - Champions Gate)
4* Celebration Hotel
Amenities: Restaurant, Pool, Fitness, Hi-Speed Internet, Golf, Tennis
Amenities: Restaurant, Pool, Fitness, Hi-Speed Internet, Golf, Tennis, Spa
(note: Vacation Package shows Boutique icon, but as of now Hotel Product does not, Spa is also now showing <again> in the VP)
4* Gaylord Palms
Amenities: Resort, Restaurant, Pool, Fitness, Hi-Speed Internet, Business, Golf, Childrens Activities, Spa
3* Parkway International
Amenities: Condo, Resort, 2 Bedroom, Kitchenette, Pool, AC, Washer/Dryer, Fitness, Parking, Front Desk, Golf, Tennis, Laundry
3* Radisson Worldgate
Amenities: Restaurant, Pool, Fitness, Business, Golf, Tennis, Laundry
3* Ramada Plaza Hotel
Amenities: Restaurant, Pool, Fitness, Golf, Laundry
2.5* Best Western Lakeside
Amenities: Restaurant, Pool, Fitness, Business, Laundry
2.5* Comfort Suites Maingate
Amenities: <none supplied>
2.5* Holiday Inn Nikki Bird - Maingate - Theme Park
Amenities: Restaurant, Pool
(VP also shows Fitness and Laundry icons, but hotel product does not)
2.5* La Quinta Lakeside
Amenities: Restaurant, Pool, Fitness, Laundry
(likely same as Holiday Inn Nikki Bird)
2.5* Ramada Inn REVIEW
Amenities: Restaurant, Pool, Fitness, Laundry
2* Country Hearth Inn (Park Inn and Suites ownership change, unknown still participating)
Amenities: Restaurant, Complimentary Breakfast, Kitchenette, Golf, Tennis, Laundry
2* Travelodge Maingate East
Amenities: Pool, Laundry