Let's say there is a hardware appliance which a company would like to rent out to customers for use e.g. during trade fairs. The appliance is fed image data, analyses it and displays the results on-screen. Some GPL-licensed libraries are being used, without any modifications to them, to do image transforms etc. (think VIPS or lightgallery, not the actual libraries we are using). The source code of the software running on the appliance cannot be accessed, copied or viewed by the customers. There are no pre-compiled binaries which might contain any of the libraries' code, as only interpreted languages are used.
Given that the appliance is not sold, the GPL-licensed libraries are not compiled as part of the product and are not modified, it is not possible for anyone who is not company-internal to access the software source-code nor any binaries, does this constitute distribution in terms of the GPL?
Would a list of used GPL-licensed libraries contained in the appliance need to be contained in the software or manual?
Are there any other considerations to take into account before offering such a product to be rented out by potential customers?
Edit: We are talking about LGPL and GPL-2.0.