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When creating an instance on GPUhuband selecting the image, use the Gromacs image to create an instance that comes with the Gromacs software package pre-installed. The pre-installed Gromacs has been compiled with CUDA, so it will use GPU acceleration for computations by default. Here is a test case for Gromacs (source of the case):

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Step 1: Preparation

Create a directory named test and navigate into it.
bash
mkdir test && cd test

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Step 2: Generate Input Files

Run this command separately; otherwise, it may hang. When prompted, select 14: GROMOS96 54a7 and 1: SPC.
bash
gmx pdb2gmx -f 2n6m.pdb -o esculentin.gro -p esculentin.top -ignh

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Step 3: Set Simulation Parameters

bash
gmx editconf -f esculentin.gro -o esculenbox.gro -box 5 5 5
gmx solvate -cp esculenbox.gro -o solvated.gro -p esculentin.top

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Step 4: Configuration

Create a configuration file options.mdp with the following content:
bash
cat > options.mdp << EOF
integrator        = md
nsteps            = 50000000
nstxout           = 50000
coulombtype       = PME
fourierspacing    = 0.15
tcoupl            = v-rescale
tau-t             = 0.2 0.2
ref-t             = 298.15 298.15
tc-grps           = Protein Non-protein
pcoupl            = berendsen
compressibility   = 4.5e-5
tau-p             = 0.2
ref-p             = 1.0
EOF
gmx grompp -f options.mdp -c solvated.gro -p esculentin.top -o esculentin.tpr -maxwarn 100

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Step 5: Run Simulation

bash
gmx mdrun -s esculentin.tpr

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Gromacs Installation Script:

bash
wget https://ftp.gromacs.org/gromacs/gromacs-2022.2.tar.gz \
    && tar xfz gromacs-2022.2.tar.gz \
    && cd gromacs-2022.2 \
    && mkdir build \
    && cd build \
    && /root/miniconda3/bin/cmake .. -DGMX_BUILD_OWN_FFTW=ON -DREGRESSIONTEST_DOWNLOAD=ON -DGMX_GPU=CUDA -DCUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda \
    && make -j8 && make check && make install \
    && cd ../../ && rm -rf gromacs-* \
    && echo "PATH=/usr/local/gromacs/bin/:\$PATH" >> /etc/profile