A gas barrier laminate comprising: a resin substrate; a first coating layer containing a carboxylic acid polymer; and a second coating layer containing a polyvalent metal compound and a resin, wherein: the resin substrate, the first coating layer, and the second coating layer are laminated in this order; a ratio of a thickness of the second coating layer to a thickness of the first coating layer is in the range of 1.0 or more and 4.0 or less; and the second coating layer satisfies all three of the following conditions 1 to 3: (condition 1) a haze of the second coating layer, as measured using a haze meter, is 8% or less; (condition 2) a surface roughness Ra of the second coating layer is 1/2 or less of the thickness of the second coating layer, wherein the surface roughness Ra is measured using a scanning probe microscope as detailed in the description; and (condition 3) the number of concave portions having a diameter of 1.5 μm or more per unit area on a surface of the second coating layer opposite to the first coating layer is 2/0.01 mm 2 or less, wherein the number of concave portions per unit area is measured as described in the description. a resin substrate; a first coating layer containing a carboxylic acid polymer; and a second coating layer containing a polyvalent metal compound and a resin, wherein: the resin substrate, the first coating layer, and the second coating layer are laminated in this order; a ratio of a thickness of the second coating layer to a thickness of the first coating layer is in the range of 1.0 or more and 4.0 or less; and the second coating layer satisfies all three of the following conditions 1 to 3: (condition 1) a haze of the second coating layer, as measured using a haze meter, is 8% or less; (condition 2) a surface roughness Ra of the second coating layer is 1/2 or less of the thickness of the second coating layer, wherein the surface roughness Ra is measured using a scanning probe microscope as detailed in the description; and (condition 3) the number of concave portions having a diameter of 1.5 μm or more per unit area on a surface of the second coating layer opposite to the first coating layer is 2/0.01 mm 2 or less, wherein the number of concave portions per unit area is measured as described in the description. the resin substrate, the first coating layer, and the second coating layer are laminated in this order; a ratio of a thickness of the second coating layer to a thickness of the first coating layer is in the range of 1.0 or more and 4.0 or less; and the second coating layer satisfies all three of the following conditions 1 to 3: (condition 1) a haze of the second coating layer, as measured using a haze meter, is 8% or less; (condition 2) a surface roughness Ra of the second coating layer is 1/2 or less of the thickness of the second coating layer, wherein the surface roughness Ra is measured using a scanning probe microscope as detailed in the description; and (condition 3) the number of concave portions having a diameter of 1.5 μm or more per unit area on a surface of the second coating layer opposite to the first coating layer is 2/0.01 mm 2 or less, wherein the number of concave portions per unit area is measured as described in the description. (condition 1) a haze of the second coating layer, as measured using a haze meter, is 8% or less; (condition 2) a surface roughness Ra of the second coating layer is 1/2 or less of the thickness of the second coating layer, wherein the surface roughness Ra is measured using a scanning probe microscope as detailed in the description; and (condition 3) the number of concave portions having a diameter of 1.5 μm or more per unit area on a surface of the second coating layer opposite to the first coating layer is 2/0.01 mm 2 or less, wherein the number of concave portions per unit area is measured as described in the description.