Gas barrier laminated body, method for producing same, member for electronic device, and electronic device

A gas barrier laminate comprising:

• a base unit that comprises a base and a modification-promoting layer and
• a gas barrier layer, wherein the gas barrier layer is on a side of the modification-promoting layer opposite to the base,
• the modification-promoting layer having a modulus of elasticity at 23° C. of 2 to 7.2 GPa,
• the base unit having a water vapor transmission rate at a temperature of 40° C. and a relative humidity of 90% of 1.0 g/(m2·day) or less, and
• the gas barrier layer being a layer formed by applying a modification treatment to a surface of a layer that comprises a polysilazane-based compound,
• the gas barrier layer comprising a modified area that has been obtained by modification treatment,
• a ratio of a nitrogen atom content to an oxygen atom content the modified area being 30 mol% or more, and
• a product of a thickness of the modification-promoting layer, in units of m, by the modulus of elasticity at 23° C. of the modification-promoting layer, in units of N/m2, is 2,200 N/m or less.