EventIDE treats all Gabor parameters relatively to the normalized size of the patch. If you set the ‘Grating Frequency’ to 6 and the element size to 1 dva (the angular size of the viewport on the screen), then you have 6cpd physically. If you increase the patch size to 6 dva without changing the gabor parameters, the physical frequency will be 1cpd. Thus, the physical spatial frequency can be calculated as:

Freq=GaborFrequency/GaborSize.aWidth;

You defined the physical sigma in dva as:

Sigma=1/Freq=1/(GaborFrequency/ GaborSize.aWidth)= GaborSize.aWidth/GaborFrequency;

Since the EventIDE sigma (Gaussian Spead property) is also normalized to the patch size, the reverse conversion is necessary to adjust the property in EventIDE:

GaussianSpread= Sigma*GaborSize.aWidth= (GaborSize.aWidth^2)/GaborFrequency;

I attached below a screenshot with 4 patches generated with the above expressions:

The used gabor parameters are (same order as on the screenshot):

Grating Frequency=6, aWidth=1 Gaussian Sigma=0.16 | Grating Frequency=1, aWidth=1 Gaussian Sigma=1 |

Grating Frequency=12, aWidth=2 Gaussian Sigma=0.16 | Grating Frequency=2, aWidth=2 Gaussian Sigma=4 |