The Bemidji Guaranteed Energy Savings Program (GESp) aims to finance building retrofits through energy and operational savings, backed by a contractor's guarantee. The project involves nine city-owned buildings with an approved budget of $2.5 million and is expected to generate annual savings of $99,000 and $21,000 in operations and maintenance, along with one-time utility rebates of $122,000. Challenges included financing issues and project delays, but the program also offered benefits like streamlined implementation and cost savings through competitive bidding.