- Ohio aquatic gap analysis--an assessment of the biodiversity and conservation status of native aquatic animal species, by S. Alex. Covert, Stephanie P. Kula, and Laura A. Simonson
- The Puerto Rico Gap Analysis Project, William A. Gould ... [and others]
- A Gap analysis of Southern New England, April 2004 final report and data, produced by the National Gap Analysis Office
- A Gap analysis of Mississippi, November 2003 final report
- A Gap analysis of Washington, September 1997 final report
- A Gap analysis of Kansas, August 2002 final report
- A Gap analysis of Texas, December 2003 final report
- Protected areas database of the United States (PAD-US)
- The North Dakota GAP analysis project, report
- Ecoregional gap analysis of the southwestern United States, the southwest regional gap analysis project final report, edited by Julie S. Prior-Magee ... [and others]
- Gap analysis of mainland California, an interactive atlas of terrestrial biodiversity and land management
- A Gap analysis of West Virginia, April 2002 final report
- A Gap analysis of Missouri, June 2002 final report
- A GAP analysis of South Dakota, SD-GAP, June 2002 final report
- A Gap analysis of Montana, September 1998 final report
- A Gap analysis of Louisiana, June 2000 final report
- The North Dakota GAP analysis project, report
- A Gap Analysis of Tennessee, June 2006 final report
- A Gap analysis of South Carolina, 2001 final report