Granulated bentonite, a swelling clay, is the key component of geosynthetic clay liners (GCLs) due to its ability to swell when hydrated, creating an impermeable barrier. GCLs have a thin layer of unhydrated granulated bentonite or powdered bentonite sandwiched between two geotextile layers. The behaviour of granulated bentonite on exposure to landfill leachates is receiving significant importance owing to its inability to seal the inter-granular voids. In this research work, one-dimensional consolidation tests were performed on granulated bentonite to study the compressibility, permeability and volume change characteristics of granulated bentonite permeated with different pore fluids. Pore fluids consisted of distilled water, 20% ethanol/methanol–80% distilled water, 40% ethanol/methanol–60% distilled water, and 60% ethanol/methanol–40% distilled water. The granulated bentonite was placed in the consolidation cell in loose unhydrated condition. The experimental results suggested that on addition of organic pore fluids both swelling percentage and swelling pressure decreased. As organic pore fluid concentration increased, the compressibility of the granulated bentonites increased. The coefficient of consolidation increased with increase in the concentration of the organic pore fluid content. Further, it was observed that the sample had to be kept for around 48 h to allow the sample to consolidate till there is little or no further compression. Permeability characteristics were also assessed, which revealed that permeability was lowest with 100% distilled water and increased with organic pore fluid concentration. These observations suggested that organic fluids influence granulated bentonite’s compressibility, permeability, and swelling behaviour, possibly affecting its long-term application within GCLs.